Optical nonlinear absorption of a few-layer MoS2 under green femtosecond excitation
| Autor: | Anatoly S. Lobach, A A Borodkin, S K Vartapetov, Danila D. Mazin, D V Khudyakov |
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| Rok vydání: | 2019 |
| Předmět: |
Quantum optics
Materials science Physics and Astronomy (miscellaneous) Relaxation (NMR) General Engineering Physics::Optics General Physics and Astronomy Second-harmonic generation Radiation 01 natural sciences Molecular physics 010309 optics chemistry.chemical_compound chemistry 0103 physical sciences Femtosecond 010306 general physics Absorption (electromagnetic radiation) Molybdenum disulfide Excitation |
| Zdroj: | Applied Physics B. 125 |
| ISSN: | 1432-0649 0946-2171 |
| DOI: | 10.1007/s00340-019-7167-2 |
| Popis: | The nonlinear optical absorption of aqueous suspension with a few-layer (4–5 layers) molybdenum disulfide (MoS2) was investigated by Z- and P-scan methods using second harmonic generation from Yb-doped femtosecond pulsed laser. Two regions with different nature of the nonlinear absorption were registered when the intensity of the incident radiation increased from low to high values. The 3-level model for one-photon transitions in the few-layer MoS2 was proposed for describing the experimental data. Absorption cross sections and relaxation times for interband and intraband transitions under femtosecond excitation on 514 nm have been estimated. |
| Databáze: | OpenAIRE |
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